Large capacity backpack: waterproof nylon material, color optional. Light weight, wear resistant, breathable. Three-dimensional breathable countercurrent layer: outdoor hiking backpack is equipped with three-dimensional breathable net on the back, to keep the back air circulation, dry and breathable, goodbye sweating, effectively relieve the fatigue brought by exercise. Wear-resistant and tear-proof: The backpack is made of high-density nylon fabric, wear-resistant and waterproof, which effectively protects the items in the backpack from getting wet. And backpack side has a USB interface, you can charge your electronic digital products at any time, practical and convenient. (excluding charging equipment) Large capacity space: The large capacity main bag comes with multiple zippers for easy sorting and carrying a variety of items. The internal computer compartment holds 15.6 inches of computer equipment. Multi-scene use: This backpack is suitable for outdoor cycling, mountaineering, camping, travel, outing, picnic, fishing and other occasions. Product Name: Backpack Material: Nylon Package Included:1x Backpack